\documentclass[a4paper, 11pt]{article}

\title{Laboratory Report \\ TTM4135 Information Security}
\author{\Huge{Group 8}\vspace{6 mm}\\  Helge Fosse \\ Vegard Gamnes \\ Kenneth Bortveit}
\usepackage[hmargin=3cm,vmargin=3cm]{geometry}
\usepackage{graphicx}
\usepackage{url} 
\begin{document}
\maketitle
\clearpage
\section{Introduction}
\input{intro.tex}
\section{Results}
\input{res.tex}
\section{Discussion}
\input{disk.tex}
\section{Conclusion}
\input{konk.tex}
\newpage \bibliographystyle{unsrt}
\bibliography{ref}
\clearpage
\appendix
\section{Appendix}
\input{ved.tex}
\end{document}